Tube-cleaner.



PATENTED MAR. 19, 1907.l

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APPLICATION FILED DEO. 16,1904.

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NITED STTES FFICE.

ERNST HEUBAOH, OF BERLIN, GERMANY, ASSIGNOR TO BENNO HERMAN, OF DETROIT, MICHIGAN.

TUBE-CLEANER.

Specification of Letters Patent.

vfatented March 19, 190'?.

Application J'ilerl December 16.1904. Serial No. 237,139.

To LZ/f whom t may con/cern.-

, Be it known that I, ERNsT IIEUBACH, engineer, a subject of the Emperor of Germany, and residing at i9 Elisabeth Ufer, Berlin, S. O., Germany, have invented a new and useful Improved Tube-Cleaner for Tubular Boilers, of which the following is a specilication.

The present invention relates to a tubeoleaner for tubular boilers.

Tube-cleaners having oscillating hammers as hitherto known can be employed only in the case of tubes having an' internal diameter above ninety millimeters-that is, tubes having a comparatively large diameterwhereas in practice boiler-tubes having a smaller diameter than the above principally occur, usually about fifty-one millimeters. The tube-cleaner according to the presentinvention is an improvement upon those tubecleaners in which the piston, operated by steam, compressed air, water, or the like, is arranged between the valve-gear and the pivot of the hammer and engages a continuation of the handle of the latter. These tubecleaners usually employ a piston having a circular cross-section, the transverse dimensions of which cannot` exceed a maximum determined. by the internal diameter of the tube.

The object of the present invention is an enlargement of the cross-section 0l' the piston in the direction of the axis of the tube, as a limit for the dimensions of the piston does not exist in this direction, and the piston receives an elliptic cross-section instead of the circular cross-section hitherto employed, the major axis lying in the direction of the axis of the tube and the minor axis at right angles to the same.

The accompanying drawings illustrate, by way of example, one embodiment of the present invention.

In said drawings, Figure l is a longitudinal section; Fig. 2, a section on the line A A of Fig. l, and Fig. 3 a section on the line B B of Fig. l, of a tube-cleaner lying in a tube which is to be cleaned. Figs. A and 5 are detail views, Fig. A being a part-sectional plan, the plane of section being at right angles to the sectional plane of Fig. 1 thro ugh the cylinder for the piston and the body for the bearings for the hammer, and Fig. 5 being a perspective view of part of said body.

In the drawings, a is the new elliptic piston, and b the cylinder appertaining' thereto, which is formed by the middle portion of the body c. The hammer (Z is mounted in this body at the front end on pivots (Z, and a con- I tinuation d2 of the handle of the hammer engages in a recess a in the piston a, so that a direct engagement of the piston with the hammer is brought about. This engagement takes place also with the utilization of steam, water, or air pressure ol no greater intensity than that hitherto employed, but with a greater force than hitherto, because the pressure-surface of the piston is now greater in consequence of its elliptic form. The enlargement of the cross-section of the piston in the direction of the major axis of the ellipse is subjected to no limitation, so that the pressure-surface su'liices in any case for all requirements occurring in practice.

A pin e, which is rigidly connected with the piston a by being screwed into the latter, if desired, extends from the piston a through a slot c2 in the back part of the body c and reaches into the reversing slide-valve f with its free end. On account of the to-and-fro movements of the piston L taking place transversely tol the axis of the tube a the pin e is moved to and fro in the slot c2 and strikes at the end of its movement against the slidevalve f, so that the latter admits the steam, the compressed water, or the like alternately into the ports g and g. These ports run helically round the back part of the body c, as can. be clearly seen by referring to Figs. l, 4, and 5.

In the case of the position shown in Fig. l the piston a has just reached the end of its stroke in the one direction, and shortly before this the pin e has engaged the slide-valve f and. driven it so that the steam or the compressed water can nowflow into the port g. The result of this is that the return stroke of the piston immediately takes place, whereby the head b3 of the hammer is likewise moved in the opposite direction. Shortly before the piston c again reaches the end of its stroke the pin e has again struck the slidevalve j' and reversed the same once more, so that the motive iuid now passes into the port g and acts on the other side of the piston.

i The water to be displaced by the piston on i its reversal, which Water has performed Work IOO during the preceding stroke, is driven back through the admission-port opening into the Water-space to the space f in the interior of the D slide-valve and flows through the slot c2, through an annular groove li', turned in the cylinder b, and through theVv space c in the body c, formed at its `iront part as a holloW body, and Washes out of the tube the pieces of scale knocked oill by the hammer.

The Water thus removed is simultaneously effective for the relieving of the slide-valve.

The body c and the valve-gear are accommodated in a casing h, Which is arranged for screwing onto of the pressure-fluid pipe.

What I claim isl. In a device of the character described, the combination, With a tubular casing, a cylinder formed therein, an elongated piston arranged Within the cylinder with its greater diameter parallel to the axis of the casing and movable transversely of said casing, a valvechamber formed Within the casing, a Wall separating the valve-chamber from the cylinder, an arm projecting from the piston and parallel to the axis of the casing, a slide-valve engaged by the arm, and channels for the motive iiuid controlled by the valve and extending irom one side olf the valve-chamber to the opposite extremity of the cylinder.

2. In a device oi the character decsribed, the combination, with a tubular casing, a cylinder formed therein With its axis arranged transversely of the axis of the casing, a piston having an elliptical cross-section movably mounted Within the cylinder With its major axis parallel to the axis ofthe casing, a valvechamber Within said casing, a Wall separating the valve-chamber from the cylinder, an arm projecting rigidly `from the piston at right angles to its line of travel, a slide-valve engaged by the arm, and motive-'Huid channels extending hclically through the Wall from one side of the valve-chamber to the opposite extremity oit the cylinder.

3. In a device of the character described, the combination, With a tubular casing, a cyllangles to its line of travel through inder formed therein with its axis arranged transversely of the casing, a piston having an elliptical cross-section movably mounted Within the cylinder With its major axis parallel to the axis of the casing, a valve-chamber Within said casing, a Wall separating the valve-chamber from the cylinder, an arm projecting rigidly from the piston at right angles to its line of travel through a slot formed in said Wall, a slide-valve engaged by the arm and spanninr the slot, motive-fluid channels 'extending Iielically through the Wall from one side of the valve-chamber to the opposite extremity of the cylinder, and an' exhaust-channel extending from the slot around the piston to an exit-port on the opposite side thereof.

4,y In a device ofthe character described, the combination, With a tubular casing, a cylinder formed therein With its axis arranged transversely ci the casing, a piston having an elliptical cross -section movably mounted Within the cylinder With its or axis parallel to the axis of the casing, a valve-chamber Within said casing, a Wall separating the valve-chamber from the cylinder, an arm projecting rigidly from the piston at right a sblot formed in said Wall, a slide-valve engaged by the arm and spanning the slot, motive-Huid channels extending helically through the Wall from one side of the valve-chamber to the opposite extremity of the cylinder, an exhaust-channel extending from the slot around the piston to an exit-port on the opposite side thereof, and mechanism mounted in the exhaust-port'and actuated by the piston.

In testimony Whereo'f I have signed my name to this specification in the presence oi tWo subscribing Witnesses.

ERNST IIEUBACH.

Witnesses: j

VOLDEMAR HAUPT, HENRY HAsPEn. 

